663835992 has 64 divisors (see below), whose sum is σ = 1778474880. Its totient is φ = 205742592.

The previous prime is 663835987. The next prime is 663836023. The reversal of 663835992 is 299538366.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24063 + ... + 43665.

It is an arithmetic number, because the mean of its divisors is an integer number (27788670).

Almost surely, 2^663835992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663835992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (889237440).

663835992 is an abundant number, since it is smaller than the sum of its proper divisors (1114638888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663835992 is a wasteful number, since it uses less digits than its factorization.

663835992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19712 (or 19708 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 51.

The square root of 663835992 is about 25765.0148845290. The cubic root of 663835992 is about 872.3422996125.

The spelling of 663835992 in words is "six hundred sixty-three million, eight hundred thirty-five thousand, nine hundred ninety-two".